Paolo mejani



, P, MEJANI.

AIQMIVZER FOR LIQUIDS. APPLICATION FILED JUNE 5 191a.

Patented Aug. 8, 1916.

Inventor Pa, 0Z0 Hes k1 121' i as PAOLO IVIEJ'ANI, 0F SPEZIA, ITALY.

ATOIVIIZER FOR LIQUIDS.

Specification of Letters Patent.

Patented Aug. 8, 1916.

Application filed June 5, 1913. Serial No. 771,963.

To all whom it may concern:

Be it known that I, PAoLo MEJANI, chief mechanician of the Royal Navy Arsenal, a subject of the King of Italy, and residing at- 2 Piazza St. Bon, Spezia, Italy, have invented certain new and useful Improvements in Atomizers for Liquids, of which the following is a specification, reference being had therein to the accompanying drawing.

The invention refers to improvementsin devices for spraying liquids and more particularly combustible liquids to be burnt in steam boiler furnaces, of the type wherein spraying disks are used and the liquid is sprayed by the agency of pressure, and it has for its object to provide for a perfect atomizing in such apparatus whatever the amount of liquid to be atomized may be, whereby an economical working is secured no matter what the intensity of the heating in the boiler to whichthe apparatus is applied. This object is obtained more par-v ticularly through a special arrangement and shape of the channels in the spraying disk. These channels are fed at their outer end through conduits provided in a rear counterplate and are preferably in the form of circular arcs. They communicate tangentially with the enlarged portion of the outlet port, whereby the advantage is obtained that the liquid leaving the channels under pressure is caused towhirl around in contact with the enlarged portion in a direction the reverse of its movement through the said channels, that is the liquid is made to change the direction of its rotation when passing from the channels into the enlargement, which causes the liquid threads to meet and'to be scattered and the liquid to be well atomized.

For the purpose of securing a perfect atomizing of the liquid whatever the amount of liquid to be atomized may be, there is provided a device which permits to put into action all or only part of the atomizing channels.

In order that the invention be readily understood, an atomizer constructed in accordance with the invention will here be described.

When liquid fuel to be burnt in steam boiler furnaces is to be atomized by the aid of the device forming the object of the invention, there may be applied to the furnace one such atomizer or also several atoimzers suitably interconnected, and means will be provided for feeding the furnace with the amount of air required for the combustion, and for heating the liquid to be atomized.

The atomizer will be described with reference to the annexed drawings, in which Figure 1 is a longitudinal section partly in side elevation of the atomizer; Fig. 2 is a partial longitudinal section of a modified constructional form of the atomizer; FigQ Sis a cross section on line ab of Fig. 1; Fig. 4 is a cross section on line 0-0Z of Fi 1; Fig. 5 is a cross section on line ef of Fig. 2, and: Fig. 6 is a cross section on line 9'h of Fig. 2.

The atomizer comprises a barrel 1 and in the barrel an axially disposed spindle 2 hav ing a smaller diameter than the barrel so as to leave a passage for the liquid. The liquid enters, for example, through the port 3 from a filter at of any suitable type, where it has been filtered.

The spindle 2 ends in a valve 5 seated in a distributing plug or counterplate 6 and having a hollow cylindrical boss 7 in whose wall are provided upper holes 8 near the valve and lower holes 9, the holes 9 being in different transverse planes around the wall of the cavity.

The boss 7 fits inthe plug 6 and is slidable therein. Around the inner wall of the plug 6 terminate conduits 10 arranged in different transverse planes like the holes 9 and each communicating through a conduit 11 within the plug with one of the channels in the spraying disk, as hereafter described.

The spindle 2 is screw-threaded at 12 and engages a screw thread 13 formed in the barrel 1 or in a capl, on the barrel, so that it may rotate and slide in the barrel when the hand wheel 15 is turned, whereby the valve 5 is opened or closed and the holes 8 are uncovered or covered and one or several or all holes 9 brought to register with, or cut off from, the respective conduits 10. Thus, when the valve 5 is open, the liquid passes through the holes 8 into the cavity of the boss 7 and may thus feed one or several or all the channels in the spraying disk according to the extent of movement of the hand-wheel 15.

The spraying disk comprises a plate 16 which has a central hole 20 forming the outlet port and widened toward the inner surface of the plate and toward the surface 17. On this surface 17 are formed the channels 18, each channel being arranged to coincide at its outer end 19 with the outlet'of one of the conduits 11 at the lower end of the plug 6 and to form a curve which communicates tangentially with the enlarged portion of the outlet port. These curves are preferably circles or arcs of a circle, and the liquid under pressure coming from the conduits 11 has imparted to it on its passage through these channels a rotary motion in the direc- 20 tion of the arrow 21, while when leaving the channels, it is made to rotate in contact with the surface of the enlargement of the outlet port in the reverse direction, that is in the direction of the arrow 22. The fluid threads of the liquid will thus meet and be scattered and be well atomized. This takes place no matter how many channels 18 are fed by the aid of the described regulating device, and a perfect atomizing will always be secured whatever the amount of liquid to be atomized in a given time and the intensity of the heating in the furnace may be.

In the example shown in Fig. 1, the plug 6 serves as counterplate for the spraying disk and is provided at its lower end with a flange 23 for securing the disk 16 to it by means of the screws 24, and the plate and plug may be easily mounted and held in place within the barrel 1 by any known means, such as the washer 25 and the locknut 26. A screwed cap 27 closes the barrel and is provided with a stufflng box packing where it is traversed by the spindle 2.

When a regulation of the feed to the channels 18 is not required and the channels are all to work at the same time as soon as the valve has been opened, the plug 6 may be omitted and the end of the device be formed in the manner shown in Fig. 2. In this case,

the valve 5 cooperates with a seat 28 at the bottom of the barrel 1 and serves only to allow more or less liquid to pass through the hole 29 for being atomized. The spraying disk is similar to the one above described,

and so are the other parts of the atomizer, except that the channels 18 extend to the periphery of the disk and that against the face 17 of the latter is held by means of screws 24: a counterplate 30 having a smaller diameter than the disk 16 and than the recess in the barrel 1 where the disk is located, while the height of the group formed by the disk and the counterplate is a little less than the depth of the recess, so that between the bottom of the barrel 1 and the upper surface of the counterplate 30 remains a space 31 and between the lateral walls of the recess and the counterplate an annular space 32, which spaces permit the liquid coming from the hole 29 to pass to the channels 18. In this case, the quantity of liquid to be atomized is regulated only by the valve 5' being more or less opened.

WVhat I claim is:

1. In an atomizer, the combination of a member provided with a perforation having a circular enlarged portion, the member being also provided with curved channels meeting the periphery of the enlargement substantially tangentially and having a curvature opposite to that of said periphery; and means for conducting fluid to said channels. 1

2. In an atomizer, the combination of a disk provided with a central perforation having a circular enlarged portion at one end, the disk being provided with curved channels meeting the periphery of said enlargement substantially tangentially and having a curvature inverse to that of the periphery; and means for conducting fluid to said channels.

3. In an atomizer, the combination of a member provided with a perforation having a substantially circular enlargement therein, the member being also provided with arcuate channels meeting the periphery of said enlargement substantially tangentially and having a curvature inverse to that of said periphery; and means for conducting fluid to said channels.

4. In an atomizer, the combination of a disk having a perforation and channels communicating therewith; a counterplate contacting said disk and provided with a bore and conduits communicating with said channels respectively at different heights of said bore; screws holding the counterplate against said disk; a hollow valve-spindle in said bore and provided with openings at different heights and angles and adapted at times to register with one or more of said conduits respectively; and means for conducting fluid into said spindle.

5. In an atomizer, the combination of a 5 member provided with a circular perforation and a plurality of curved channels communicating therewith and having a curvature inverse to that of the periphery of the perforation; a counterplate superposed on said member and provided with conduits communicating with the respective channels; and means for at will conducting fluid to one or more or all of said conduits.

6. In an atomizer, the combination of a disk having a perforation and channels communicating therewith; a counterplate secured to said disk and provided with a bore and conduits communicating with said channels respectively at different heights of said here; a hollow valve-spindle in said bore and name in the presence of two subscribing provided With openings at different heights Witnesses the 24th day of May 1913. and angles and adapted at times to register With one or more of said conduits respec- PAOLO MEJANI. 5 tively; and means for conducting fluid into Witnesses:

said spindle. GIOVANNI VALATELLI, In testimony whereof I have signed my CORELLO FONTANI.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

